123555656 has 24 divisors (see below), whose sum is σ = 269490870. Its totient is φ = 52952256.

The previous prime is 123555647. The next prime is 123555659. The reversal of 123555656 is 656555321.

It can be written as a sum of positive squares in only one way, i.e., 120780100 + 2775556 = 10990^2 + 1666^2 .

It is not an unprimeable number, because it can be changed into a prime (123555659) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 157205 + ... + 157988.

Almost surely, 2^123555656 is an apocalyptic number.

It is an amenable number.

123555656 is an abundant number, since it is smaller than the sum of its proper divisors (145935214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123555656 is a wasteful number, since it uses less digits than its factorization.

123555656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315213 (or 315202 counting only the distinct ones).

The product of its digits is 135000, while the sum is 38.

The square root of 123555656 is about 11115.5591852142. The cubic root of 123555656 is about 498.0667426662.

The spelling of 123555656 in words is "one hundred twenty-three million, five hundred fifty-five thousand, six hundred fifty-six".